Solution
1. Press [Additional Functions].
2. Press [Left cursor] or [Right cursor] to select [COMMON SETTINGS] then press [OK].
3. Press [Left cursor] or [Right cursor] to select [TONER SAVER MODE] then press [OK].
4. Press [Left cursor] or [Right cursor] to select [OFF] then press [OK].
5. Press [Stop] to return to the standby mode.
